Forest Flaniken, 53, was riding his bike down a stretch of Avalon Boulevard when the teen struck him and kept going. An alert motorist followed him and shot the crucial cellphone video.

Witness: Anthony, that's your pipe right there?Moffa: Yes.Witness: You were the one driving the car?Moffa: Yes sir.Witness: You're high right now?Moffa: Yes sir.

Moffa admitted he had used synthetic marijuana called K-2 when he plowed into Flaniken.

The FHP said the drug is marketed to look fun and innocent with names like Scooby Snax and Mr. Smiley Face.

"It's not innocent, and young people consuming this, there are consequences," said Kim Montes with Florida Highway Patrol.

At the time of this accident last year, the FHP did not have a presumptive test for impairment like an alcohol breathalyzer.

It took the extra step of confirming through blood samples and a scientist at the University of Florida that Moffa had K-2 in his blood beyond so-called "therapeutic levels."

But it was the video that sealed the case.

"This was the highway patrol's dream," said Montes.

Flowers and a note from his family mark where Flaniken was hit.

Moffa pleaded no contest to a count of vehicular homicide. He's started a 30-month prison sentence followed by 10 years of probation and 250 hours of community service. He'll be talking to teens about the dangers of drugs and driving.

He was also ordered to pay $25,000 in restitution and his driver's livense will be suspended for eight years.

NEWLY RELEASED VIDEO SHOWS AN ORANGE COUNTY TEEN ADMITTING THAT HE'S HIGH. IT'S TAKEN MOMENTS AFTER HE RAN OVER AND KILLED AN AVALON PARK CYCLIST AND FATHER. 19-YEAR-OLD ANTHONY MOVE IS SERVING PRISON TIME AND INVESTIGATORS SAY THIS VIDEO IS A BIG REASON WHY. BOB KEALING JOINS US LIVE WITH THIS TRAGEDY WITH THE LATEST NOW. THE VICTIM WAS RIDING IN THIS CLEARLY MARKED BIKE LANE RIGHT HERE ON AVALON PARK BOULEVARD WHEN HE WAS STRUCK BY THAT TEEN WHO WAS HIGH ON SYNTHETIC MAYBE WAUNA. THE MAN FELL WHERE THE FLOWERS ARE. BUT A WITNESS SHOT WHAT TURNED OUT TO BE SOME CRUCIAL VIDEO. YOU ARE HIGH RIGHT NOW? YES. AN ALERT WITNESS TOOK THIS CELL PHONE VIDEO OF A GROGGY 18-YEAR-OLD ANTHONY MOFFA MINUTES AFTER THE FHP SAYS HE STRUCK AND FATALLY INJURED A CYCLIST AND KEPT ON GOING. THAT'S YOUR PIPE RIGHT THERE? YES. OKAY. AND YOU WERE THE ONE DRIVING THE CAR? YES. MOFFA ALSO ADMITTED HE USED SYNTHETIC MARIJUANA CALLED K2 WHEN HE PLOWED INTO CYCLIST AND FATHER OF 353-YEAR-OLD FLANAGAN. THE FHP SAYS THE DRUG IS MARKETED TO LOOK FUN WITH NAME LIKE SCOOBY SNACKS AND MR. SMILEY FACE. IT'S NOT INNOCENT. AND THESE TEENAGERS OR YOUNG PEOPLE THAT ARE CONSUMING THIS, THEY HAVE CONSEQUENCES. AT THAT TIME OF THIS ACCIDENT LAST YEAR THE FHP DID NOT HAVE A PRESUMPTIVE TEST FOR IMPAIRMENT LIKE AN ALCOHOL BREATHALYZER. INVESTIGATORS HAD TO TAKE THE EXTRA STEP OF CONFIRMING THROUGH BLOOD SAMPLES AND A SCIENTIST AT UF THAT HE HAD Q2 BEYOND SO-CALLED THERAPEUTIC LEVELS. BUT IT WAS THIS VIDEO THAT SEALED THE CASE. THIS WAS THE HIGHWAY PATROL'S DREAM. TODAY FLOWERS AND A NOTE FROM HIS FAMILY MARK WHERE FLANAGAN FELL ALONG AVALON PARK BOULEVARD. MOFFA PLEADED NO CONTEST TO A COUNT OF VEHICULAR HOMICIDE. HE STARTED A 30 MONTH PRISON SENTENCE TO BE FOLLOWED BY THE YEARS PROBATION AND 250 HOURS COMMUNITY SERVICE TALKING TO TEENS ABOUT THE DANGERS OF DRUGS AND DRIVING. BESIDES ALL THAT, MOFFA ALSO HAS TO PAY $25,000 IN RESTITUTION AND BY THE WAY WHEN HE IS FINALLY RELEASED FROM PRISON, THE JUDGE ALSO ORDERED THAT HIS DRIVER'S LICENSE BE REVOKED FOR ANOTHER EIGHT YEARS.